Finding the Fourth Proportional to 2,645.34, 3,969.09 and 914.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.34 : 3,969.09 = 914.10 : x
2. Step 2: Convert to fraction form
   2,645.34/3,969.09 = 914.10/x
3. Step 3: Cross multiply
   2,645.34x = 3,969.09 × 914.10
4. Step 4: Simplify right side
   2,645.34x = 3,628,145.17
5. Step 5: Solve for x
   x = 3,628,145.17/2,645.34
6. Step 6: Final answer
   x = 1,371.52